Katy Perry and John Mayer were reportedly back together as they were spotted hanging out at the cocktail bar of a West Hollywood nightspot, Ysabel.

Last month, Katy Perry and John Mayer were reported to have split after trying to have another go at their on-and-off relationship.

"Apparently the musical pair were spotted What do you think?hanging out on April 4 in West Hollywood at the cocktail bar, Ysabel," said Perez Hilton. "According to an eyewitness, the duo didn't hide their physical attraction to each other from the world. They were supposedly super cozy, holding hands the entire night in the presence of another couple!"

Grazia magazine, per Music News, ran an article alleging that Katy Perry was out to give John Mayer a taste of his own medicine after being on "constant jealousy" while they were together.

"When they got back together, John promised that things would be different this time, so she agreed to give him another chance, but rumors of his philandering continue," the source added.

"She decided that if he's not going to fully commit, neither will she. Her hope was that if John saw her socializing with other men, he'd see what he stands to lose."

There were many speculations regarding the reason for the split between Katy Perry and John Mayer.

A source close to John Mayer told E! News reported that the "Your Body is a Wonderland" singer has been telling friends that he and Katy Perry are "over for good."

The article added, "Their latest breakup was not caused by Perry's touring, but rather a 'lack of emotional interest on his end.' Or to be more blunt, Mayer is telling pals he 'fell out of love with Perry but will always love her.'"

Meanwhile, Radar Online claimed that John Mayer was envious of the success of Katy Perry which led to the split.

"The fact that he does not have anything major going on with his career is really starting to take a toll on their relationship. Katy is at an all-time high," it said. "She is starting to give in to what everyone around her is saying, that maybe she is too good for him."